fix(list): ensure items are not undefined
fix(list): ensure items are not undefined

When navigating away from the current page, list items may become undefined. The config setup runs whenever there is a change, which generates an error when items are undefined.

patternfly/patternfly-ng,dlabrecq/patternfly-ng,dlabrecq/patternfly-ng,dlabrecq/patternfly-ng,patternfly/patternfly-ng,dlabrecq/patternfly-ng,patternfly/patternfly-ng,patternfly/patternfly-ng